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Key value observing NSManagedObjects

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Key value observing NSManagedObjects

Subject: Key value observing NSManagedObjects
From: Martin <email@hidden>
Date: Thu, 21 Feb 2008 20:49:58 +0100

Hi,

I'd like to key-value observe a property of an NSManagedObject. I tried to register an observer (in the init: method of my app's controller) using "addObserver:forKeyPath:options:" but it doesn't work because the observation is lost as my object gets dealloc'ed soon after I register as an observer. This is specified in the Core Data documentation : "Core Data "owns" the life-cycle of managed objects. [...] managed objects can be instantiated, destroyed, and resurrected by the framework as it requires."

So how can I observe a Core Data object property and how can the observation survive the multiple instantiations/desctructions of the NSManagedObject?

Thanks,
-Martin.
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